CAJ | 학술논문

以叔丁醇为成形介质和造孔剂,二氧化钛为烧结助剂,采用凝胶注模成形和无压烧结工艺制备堇青石多孔陶瓷.研究了添加5%(体积分数,下同)二氧化钛对堇青石多孔陶瓷的气孔率、微观结构、力学性能和气孔结构的影响,并对样品的断口形貌进行观察.结果表明,在1175 ℃烧结温度条件下,与不添加二氧化钛相比,当二氧化钛含量为5%时,所得堇青石多孔陶瓷的气孔率和开口气孔率分别由76.9%和96.4%下降为72.4%和95.1%,线性收缩率从20.7%提高到22.1%,而抗压强度则由3.23 MPa提高到5.83 MPa,气孔尺寸均呈单峰分布,中位孔径由2.29 μm下降到1.62 μm.二氧化钛的加入提高了堇青石粉末的低温烧结性能,在未明显降低堇青石多孔陶瓷气孔率以及未改变其气孔结构、孔径尺寸分布的前提下,材料的力学性能得到了显著改善.
이숙정순위성형개질화조공제,이양화태위소결조제,채용응효주모성형화무압소결공예제비근청석다공도자.연구료첨가5%(체적분수,하동)이양화태대근청석다공도자적기공솔、미관결구、역학성능화기공결구적영향,병대양품적단구형모진행관찰.결과표명,재1175 ℃소결온도조건하,여불첨가이양화태상비,당이양화태함량위5%시,소득근청석다공도자적기공솔화개구기공솔분별유76.9%화96.4%하강위72.4%화95.1%,선성수축솔종20.7%제고도22.1%,이항압강도칙유3.23 MPa제고도5.83 MPa,기공척촌균정단봉분포,중위공경유2.29 μm하강도1.62 μm.이양화태적가입제고료근청석분말적저온소결성능,재미명현강저근청석다공도자기공솔이급미개변기기공결구、공경척촌분포적전제하,재료적역학성능득도료현저개선.
Porous cordierite ceramics was successfully fabricated by gelcasting and pressureless sintering process with tert-butyl alcohol as the pore-former and titanium dioxide as the sintering assistant. The influences of 5% titanium dioxide on porosity, microstructure, mechanical properties and pore structure of porous cordierite ceramics were studied, and the fracture morphology obtained after compression experiment was also observed. Compared to the cordierite ceramics without the addition of TiO_2, with the addition of 5% TiO_2 and at 1175℃ of sintering temperature, the porosity and open porosity of the sintered cordierite ceramics decreased from 76.9% and 96.4% to 72.4% and 95.1%, respectively. The line shrinkage ratio increased from 21.3% to 23.5%, and the compression strength increased from 3.23 MPa to 5.83 MPa. The pore size presented single peak distribution, and the median pore diameter decreased from 2.29 μm to 1.62 μm. The addition of titanium dioxide increased the sinterability of the cordierite ceramics. The mechanical properties of the materials were greatly improved while the porosity, pore structure and pore size distribution of the porous cordierite ceramics were not obviously changed.